Trace detection of nitro aromatic explosives by highly fluorescent g-C3N4 nanosheets. Issue 2 (27th November 2014)

• Record Type: Journal Article
• Authors: Chen, Hai-Yu; Ruan, Lin-Wei; Jiang, Xia; Qiu, Ling-Guang
• Is Part Of: Analyst. Volume 140:Issue 2(2015)
• Page Start: 637
• Page End: 643
• Publication Date: 2014-11-27
• Subjects: Chemistry, Analytic -- Periodicals; 543
• DOI: 10.1039/c4an01693a
• Languages: English
• ISSNs: 0003-2654

Abstract

Abstract : Ultrasonic assisted synthesised strong fluorescence g-C3 N4 nanosheets with a quantum yield up to 32% for trace level explosives sensing. Abstract : Highly fluorescent g-C3 N4 nanosheets were facilely fabricated by exfoliating bulk g-C3 N4 under ultrasonic irradiation for 1 h. The atomic force microscopy (AFM) image shows that the resultant g-C3 N4 nanosheets are ∼6–14 nm thick, and the suspension is stable in air for several weeks. Remarkably, the obtained nanosheets exhibited strong fluorescence with an extremely high quantum yield (QY) up to 32%, and high sensitivity, selectivity, as well as a fast response to nitro aromatic explosives were observed. Typically, the quenching efficiency coefficient K sv for PNP was 30 460 M −1, which proved that the resultant nanosheets possessed an extremely high sensitivity for nitro-phenol PNP detection.